\u7ecf\u5178SQL\u8bed\u53e5\u96c6\u9526<\/p>\n
\u4e0b\u5217\u8bed\u53e5\u90e8\u5206\u662fMsSql\u8bed\u53e5\uff0c\u4e0d\u53ef\u4ee5\u5728access\u4e2d\u4f7f\u7528\u3002<\/p>\n
SQL\u5206\u7c7b\uff1a
\nDDL\u2014\u6570\u636e\u5b9a\u4e49\u8bed\u8a00(Create\uff0cAlter\uff0cDrop\uff0cDECLARE)
\nDML\u2014\u6570\u636e\u64cd\u7eb5\u8bed\u8a00(Select\uff0cDelete\uff0cUpdate\uff0cInsert)
\nDCL\u2014\u6570\u636e\u63a7\u5236\u8bed\u8a00(GRANT\uff0cREVOKE\uff0cCOMMIT\uff0cROLLBACK)<\/p>\n
\u9996\u5148,\u7b80\u8981\u4ecb\u7ecd\u57fa\u7840\u8bed\u53e5\uff1a
\n1\u3001\u8bf4\u660e\uff1a\u521b\u5efa\u6570\u636e\u5e93
\nCreate DATABASE database-name
\n2\u3001\u8bf4\u660e\uff1a\u5220\u9664\u6570\u636e\u5e93
\ndrop database dbname
\n3\u3001\u8bf4\u660e\uff1a\u5907\u4efdsql server
\n— \u521b\u5efa \u5907\u4efd\u6570\u636e\u7684 device
\nUSE master
\nEXEC sp_addumpdevice 'disk', 'testBack', 'c:\\mssql7backup\\MyNwind_1.dat'
\n— \u5f00\u59cb \u5907\u4efd
\nBACKUP DATABASE pubs TO testBack
\n4\u3001\u8bf4\u660e\uff1a\u521b\u5efa\u65b0\u8868
\ncreate table tabname(col1 type1 [not null] [primary key],col2 type2 [not null],..)
\n\u6839\u636e\u5df2\u6709\u7684\u8868\u521b\u5efa\u65b0\u8868\uff1a
\nA\uff1acreate table tab_new like tab_old (\u4f7f\u7528\u65e7\u8868\u521b\u5efa\u65b0\u8868)
\nB\uff1acreate table tab_new as select col1,col2\u2026 from tab_old definition only
\n5\u3001\u8bf4\u660e\uff1a\u5220\u9664\u65b0\u8868
\ndrop table tabname
\n6\u3001\u8bf4\u660e\uff1a\u589e\u52a0\u4e00\u4e2a\u5217
\nAlter table tabname add column col type
\n\u6ce8\uff1a\u5217\u589e\u52a0\u540e\u5c06\u4e0d\u80fd\u5220\u9664\u3002DB2\u4e2d\u5217\u52a0\u4e0a\u540e\u6570\u636e\u7c7b\u578b\u4e5f\u4e0d\u80fd\u6539\u53d8\uff0c\u552f\u4e00\u80fd\u6539\u53d8\u7684\u662f\u589e\u52a0varchar\u7c7b\u578b\u7684\u957f\u5ea6\u3002
\n7\u3001\u8bf4\u660e\uff1a\u6dfb\u52a0\u4e3b\u952e\uff1a Alter table tabname add primary key(col)
\n\u8bf4\u660e\uff1a\u5220\u9664\u4e3b\u952e\uff1a Alter table tabname drop primary key(col)
\n8\u3001\u8bf4\u660e\uff1a\u521b\u5efa\u7d22\u5f15\uff1acreate [unique] index idxname on tabname(col\u2026.)
\n\u5220\u9664\u7d22\u5f15\uff1adrop index idxname
\n\u6ce8\uff1a\u7d22\u5f15\u662f\u4e0d\u53ef\u66f4\u6539\u7684\uff0c\u60f3\u66f4\u6539\u5fc5\u987b\u5220\u9664\u91cd\u65b0\u5efa\u3002
\n9\u3001\u8bf4\u660e\uff1a\u521b\u5efa\u89c6\u56fe\uff1acreate view viewname as select statement
\n\u5220\u9664\u89c6\u56fe\uff1adrop view viewname
\n10\u3001\u8bf4\u660e\uff1a\u51e0\u4e2a\u7b80\u5355\u7684\u57fa\u672c\u7684sql\u8bed\u53e5
\n\u9009\u62e9\uff1aselect * from table1 where \u8303\u56f4
\n\u63d2\u5165\uff1ainsert into table1(field1,field2) values(value1,value2)
\n\u5220\u9664\uff1adelete from table1 where \u8303\u56f4
\n\u66f4\u65b0\uff1aupdate table1 set field1=value1 where \u8303\u56f4
\n\u67e5\u627e\uff1aselect * from table1 where field1 like \u2019%value1%\u2019 —like\u7684\u8bed\u6cd5\u5f88\u7cbe\u5999\uff0c\u67e5\u8d44\u6599!
\n\u6392\u5e8f\uff1aselect * from table1 order by field1,field2 [desc]
\n\u603b\u6570\uff1aselect count * as totalcount from table1
\n\u6c42\u548c\uff1aselect sum(field1) as sumvalue from table1
\n\u5e73\u5747\uff1aselect avg(field1) as avgvalue from table1
\n\u6700\u5927\uff1aselect max(field1) as maxvalue from table1
\n\u6700\u5c0f\uff1aselect min(field1) as minvalue from table1
\n11\u3001\u8bf4\u660e\uff1a\u51e0\u4e2a\u9ad8\u7ea7\u67e5\u8be2\u8fd0\u7b97\u8bcd
\nA\uff1a UNION \u8fd0\u7b97\u7b26
\nUNION \u8fd0\u7b97\u7b26\u901a\u8fc7\u7ec4\u5408\u5176\u4ed6\u4e24\u4e2a\u7ed3\u679c\u8868\uff08\u4f8b\u5982 TABLE1 \u548c TABLE2\uff09\u5e76\u6d88\u53bb\u8868\u4e2d\u4efb\u4f55\u91cd\u590d\u884c\u800c\u6d3e\u751f\u51fa\u4e00\u4e2a\u7ed3\u679c\u8868\u3002\u5f53 ALL \u968f UNION \u4e00\u8d77\u4f7f\u7528\u65f6\uff08\u5373 UNION ALL\uff09\uff0c\u4e0d\u6d88\u9664\u91cd\u590d\u884c\u3002\u4e24\u79cd\u60c5\u51b5\u4e0b\uff0c\u6d3e\u751f\u8868\u7684\u6bcf\u4e00\u884c\u4e0d\u662f\u6765\u81ea TABLE1 \u5c31\u662f\u6765\u81ea TABLE2\u3002
\nB\uff1a EXCEPT \u8fd0\u7b97\u7b26
\nEXCEPT \u8fd0\u7b97\u7b26\u901a\u8fc7\u5305\u62ec\u6240\u6709\u5728 TABLE1 \u4e2d\u4f46\u4e0d\u5728 TABLE2 \u4e2d\u7684\u884c\u5e76\u6d88\u9664\u6240\u6709\u91cd\u590d\u884c\u800c\u6d3e\u751f\u51fa\u4e00\u4e2a\u7ed3\u679c\u8868\u3002\u5f53 ALL \u968f EXCEPT \u4e00\u8d77\u4f7f\u7528\u65f6 (EXCEPT ALL)\uff0c\u4e0d\u6d88\u9664\u91cd\u590d\u884c\u3002
\nC\uff1a INTERSECT \u8fd0\u7b97\u7b26
\nINTERSECT \u8fd0\u7b97\u7b26\u901a\u8fc7\u53ea\u5305\u62ec TABLE1 \u548c TABLE2 \u4e2d\u90fd\u6709\u7684\u884c\u5e76\u6d88\u9664\u6240\u6709\u91cd\u590d\u884c\u800c\u6d3e\u751f\u51fa\u4e00\u4e2a\u7ed3\u679c\u8868\u3002\u5f53 ALL \u968f INTERSECT \u4e00\u8d77\u4f7f\u7528\u65f6 (INTERSECT ALL)\uff0c\u4e0d\u6d88\u9664\u91cd\u590d\u884c\u3002
\n\u6ce8\uff1a\u4f7f\u7528\u8fd0\u7b97\u8bcd\u7684\u51e0\u4e2a\u67e5\u8be2\u7ed3\u679c\u884c\u5fc5\u987b\u662f\u4e00\u81f4\u7684\u3002
\n12\u3001\u8bf4\u660e\uff1a\u4f7f\u7528\u5916\u8fde\u63a5
\nA\u3001left outer join\uff1a
\n\u5de6\u5916\u8fde\u63a5\uff08\u5de6\u8fde\u63a5\uff09\uff1a\u7ed3\u679c\u96c6\u51e0\u5305\u62ec\u8fde\u63a5\u8868\u7684\u5339\u914d\u884c\uff0c\u4e5f\u5305\u62ec\u5de6\u8fde\u63a5\u8868\u7684\u6240\u6709\u884c\u3002
\nSQL: select a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c
\nB\uff1aright outer join:
\n\u53f3\u5916\u8fde\u63a5(\u53f3\u8fde\u63a5)\uff1a\u7ed3\u679c\u96c6\u65e2\u5305\u62ec\u8fde\u63a5\u8868\u7684\u5339\u914d\u8fde\u63a5\u884c\uff0c\u4e5f\u5305\u62ec\u53f3\u8fde\u63a5\u8868\u7684\u6240\u6709\u884c\u3002
\nC\uff1afull outer join\uff1a
\n\u5168\u5916\u8fde\u63a5\uff1a\u4e0d\u4ec5\u5305\u62ec\u7b26\u53f7\u8fde\u63a5\u8868\u7684\u5339\u914d\u884c\uff0c\u8fd8\u5305\u62ec\u4e24\u4e2a\u8fde\u63a5\u8868\u4e2d\u7684\u6240\u6709\u8bb0\u5f55\u3002<\/p>\n
\u5176\u6b21\uff0c\u5927\u5bb6\u6765\u770b\u4e00\u4e9b\u4e0d\u9519\u7684sql\u8bed\u53e5
\n1\u3001\u8bf4\u660e\uff1a\u590d\u5236\u8868(\u53ea\u590d\u5236\u7ed3\u6784,\u6e90\u8868\u540d\uff1aa \u65b0\u8868\u540d\uff1ab) (Access\u53ef\u7528)
\n\u6cd5\u4e00\uff1aselect * into b from a where 1<>1
\n\u6cd5\u4e8c\uff1aselect top 0 * into b from a<\/p>\n
2\u3001\u8bf4\u660e\uff1a\u62f7\u8d1d\u8868(\u62f7\u8d1d\u6570\u636e,\u6e90\u8868\u540d\uff1aa \u76ee\u6807\u8868\u540d\uff1ab) (Access\u53ef\u7528)
\ninsert into b(a, b, c) select d,e,f from b;<\/p>\n
3\u3001\u8bf4\u660e\uff1a\u8de8\u6570\u636e\u5e93\u4e4b\u95f4\u8868\u7684\u62f7\u8d1d(\u5177\u4f53\u6570\u636e\u4f7f\u7528\u7edd\u5bf9\u8def\u5f84) (Access\u53ef\u7528)
\ninsert into b(a, b, c) select d,e,f from b in \u2018\u5177\u4f53\u6570\u636e\u5e93\u2019 where \u6761\u4ef6
\n\u4f8b\u5b50\uff1a..from b in '"&Server.MapPath(".")&"\\data.mdb" &"' where..<\/p>\n
4\u3001\u8bf4\u660e\uff1a\u5b50\u67e5\u8be2(\u8868\u540d1\uff1aa \u8868\u540d2\uff1ab)
\nselect a,b,c from a where a IN (select d from b ) \u6216\u8005: select a,b,c from a where a IN (1,2,3)<\/p>\n
5\u3001\u8bf4\u660e\uff1a\u663e\u793a\u6587\u7ae0\u3001\u63d0\u4ea4\u4eba\u548c\u6700\u540e\u56de\u590d\u65f6\u95f4
\nselect a.title,a.username,b.adddate from table a,(select max(adddate) adddate from table where table.title=a.title) b<\/p>\n
6\u3001\u8bf4\u660e\uff1a\u5916\u8fde\u63a5\u67e5\u8be2(\u8868\u540d1\uff1aa \u8868\u540d2\uff1ab)
\nselect a.a, a.b, a.c, b.c, b.d, b.f from a LEFT OUT JOIN b ON a.a = b.c<\/p>\n
7\u3001\u8bf4\u660e\uff1a\u5728\u7ebf\u89c6\u56fe\u67e5\u8be2(\u8868\u540d1\uff1aa )
\nselect * from (Select a,b,c FROM a) T where t.a > 1;<\/p>\n
8\u3001\u8bf4\u660e\uff1abetween\u7684\u7528\u6cd5,between\u9650\u5236\u67e5\u8be2\u6570\u636e\u8303\u56f4\u65f6\u5305\u62ec\u4e86\u8fb9\u754c\u503c,not between\u4e0d\u5305\u62ec
\nselect * from table1 where time between time1 and time2
\nselect a,b,c, from table1 where a not between \u6570\u503c1 and \u6570\u503c2<\/p>\n
9\u3001\u8bf4\u660e\uff1ain \u7684\u4f7f\u7528\u65b9\u6cd5
\nselect * from table1 where a [not] in (\u2018\u503c1\u2019,\u2019\u503c2\u2019,\u2019\u503c4\u2019,\u2019\u503c6\u2019)<\/p>\n
10\u3001\u8bf4\u660e\uff1a\u4e24\u5f20\u5173\u8054\u8868\uff0c\u5220\u9664\u4e3b\u8868\u4e2d\u5df2\u7ecf\u5728\u526f\u8868\u4e2d\u6ca1\u6709\u7684\u4fe1\u606f
\ndelete from table1 where not exists ( select * from table2 where table1.field1=table2.field1 )<\/p>\n
11\u3001\u8bf4\u660e\uff1a\u56db\u8868\u8054\u67e5\u95ee\u9898\uff1a
\nselect * from a left inner join b on a.a=b.b right inner join c on a.a=c.c inner join d on a.a=d.d where …..<\/p>\n
12\u3001\u8bf4\u660e\uff1a\u65e5\u7a0b\u5b89\u6392\u63d0\u524d\u4e94\u5206\u949f\u63d0\u9192
\nSQL: select * from \u65e5\u7a0b\u5b89\u6392 where datediff('minute',f\u5f00\u59cb\u65f6\u95f4,getdate())>5<\/p>\n
13\u3001\u8bf4\u660e\uff1a\u4e00\u6761sql \u8bed\u53e5\u641e\u5b9a\u6570\u636e\u5e93\u5206\u9875
\nselect top 10 b.* from (select top 20 \u4e3b\u952e\u5b57\u6bb5,\u6392\u5e8f\u5b57\u6bb5 from \u8868\u540d order by \u6392\u5e8f\u5b57\u6bb5 desc) a,\u8868\u540d b where b.\u4e3b\u952e\u5b57\u6bb5 = a.\u4e3b\u952e\u5b57\u6bb5 order by a.\u6392\u5e8f\u5b57\u6bb5<\/p>\n
14\u3001\u8bf4\u660e\uff1a\u524d10\u6761\u8bb0\u5f55
\nselect top 10 * form table1 where \u8303\u56f4<\/p>\n
15\u3001\u8bf4\u660e\uff1a\u9009\u62e9\u5728\u6bcf\u4e00\u7ec4b\u503c\u76f8\u540c\u7684\u6570\u636e\u4e2d\u5bf9\u5e94\u7684a\u6700\u5927\u7684\u8bb0\u5f55\u7684\u6240\u6709\u4fe1\u606f(\u7c7b\u4f3c\u8fd9\u6837\u7684\u7528\u6cd5\u53ef\u4ee5\u7528\u4e8e\u8bba\u575b\u6bcf\u6708\u6392\u884c\u699c,\u6bcf\u6708\u70ed\u9500\u4ea7\u54c1\u5206\u6790,\u6309\u79d1\u76ee\u6210\u7ee9\u6392\u540d,\u7b49\u7b49.)
\nselect a,b,c from tablename ta where a=(select max(a) from tablename tb where tb.b=ta.b)<\/p>\n
16\u3001\u8bf4\u660e\uff1a\u5305\u62ec\u6240\u6709\u5728 TableA \u4e2d\u4f46\u4e0d\u5728 TableB\u548cTableC \u4e2d\u7684\u884c\u5e76\u6d88\u9664\u6240\u6709\u91cd\u590d\u884c\u800c\u6d3e\u751f\u51fa\u4e00\u4e2a\u7ed3\u679c\u8868
\n(select a from tableA ) except (select a from tableB) except (select a from tableC)<\/p>\n
17\u3001\u8bf4\u660e\uff1a\u968f\u673a\u53d6\u51fa10\u6761\u6570\u636e
\nselect top 10 * from tablename order by newid()<\/p>\n
18\u3001\u8bf4\u660e\uff1a\u968f\u673a\u9009\u62e9\u8bb0\u5f55
\nselect newid()<\/p>\n
19\u3001\u8bf4\u660e\uff1a\u5220\u9664\u91cd\u590d\u8bb0\u5f55
\nDelete from tablename where id not in (select max(id) from tablename group by col1,col2,…)<\/p>\n
20\u3001\u8bf4\u660e\uff1a\u5217\u51fa\u6570\u636e\u5e93\u91cc\u6240\u6709\u7684\u8868\u540d
\nselect name from sysobjects where type='U'<\/p>\n
21\u3001\u8bf4\u660e\uff1a\u5217\u51fa\u8868\u91cc\u7684\u6240\u6709\u7684
\nselect name from syscolumns where id=object_id('TableName')<\/p>\n
22\u3001\u8bf4\u660e\uff1a\u5217\u793atype\u3001vender\u3001pcs\u5b57\u6bb5\uff0c\u4ee5type\u5b57\u6bb5\u6392\u5217\uff0ccase\u53ef\u4ee5\u65b9\u4fbf\u5730\u5b9e\u73b0\u591a\u91cd\u9009\u62e9\uff0c\u7c7b\u4f3cselect \u4e2d\u7684case\u3002
\nselect type,sum(case vender when 'A' then pcs else 0 end),sum(case vender when 'C' then pcs else 0 end),sum(case vender when 'B' then pcs else 0 end) FROM tablename group by type
\n\u663e\u793a\u7ed3\u679c\uff1a
\ntype vender pcs
\n\u7535\u8111 A 1
\n\u7535\u8111 A 1
\n\u5149\u76d8 B 2
\n\u5149\u76d8 A 2
\n\u624b\u673a B 3
\n\u624b\u673a C 3<\/p>\n
23\u3001\u8bf4\u660e\uff1a\u521d\u59cb\u5316\u8868table1
\nTRUNCATE TABLE table1<\/p>\n
24\u3001\u8bf4\u660e\uff1a\u9009\u62e9\u4ece10\u523015\u7684\u8bb0\u5f55
\nselect top 5 * from (select top 15 * from table order by id asc) table_\u522b\u540d order by id desc<\/p>\n
\u968f\u673a\u9009\u62e9\u6570\u636e\u5e93\u8bb0\u5f55\u7684\u65b9\u6cd5\uff08\u4f7f\u7528Randomize\u51fd\u6570\uff0c\u901a\u8fc7SQL\u8bed\u53e5\u5b9e\u73b0\uff09
\n\u5bf9\u5b58\u50a8\u5728\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u6765\u8bf4\uff0c\u968f\u673a\u6570\u7279\u6027\u80fd\u7ed9\u51fa\u4e0a\u9762\u7684\u6548\u679c\uff0c\u4f46\u5b83\u4eec\u53ef\u80fd\u592a\u6162\u4e86\u4e9b\u3002\u4f60\u4e0d\u80fd\u8981\u6c42ASP\u201c\u627e\u4e2a\u968f\u673a\u6570\u201d\u7136\u540e\u6253\u5370\u51fa\u6765\u3002\u5b9e\u9645\u4e0a\u5e38\u89c1\u7684\u89e3\u51b3\u65b9\u6848\u662f\u5efa\u7acb\u5982\u4e0b\u6240\u793a\u7684\u5faa\u73af\uff1a
\nRandomize
\nRNumber = Int(Rnd*499) +1<\/p>\n
While Not objRec.EOF
\nIf objRec("ID") = RNumber THEN
\n… \u8fd9\u91cc\u662f\u6267\u884c\u811a\u672c …
\nend if
\nobjRec.MoveNext
\nWend<\/p>\n
\u8fd9\u5f88\u5bb9\u6613\u7406\u89e3\u3002\u9996\u5148\uff0c\u4f60\u53d6\u51fa1\u5230500\u8303\u56f4\u4e4b\u5185\u7684\u4e00\u4e2a\u968f\u673a\u6570\uff08\u5047\u8bbe500\u5c31\u662f\u6570\u636e\u5e93\u5185\u8bb0\u5f55\u7684\u603b\u6570\uff09\u3002\u7136\u540e\uff0c\u4f60\u904d\u5386\u6bcf\u4e00\u8bb0\u5f55\u6765\u6d4b\u8bd5ID \u7684\u503c\u3001\u68c0\u67e5\u5176\u662f\u5426\u5339\u914dRNumber\u3002\u6ee1\u8db3\u6761\u4ef6\u7684\u8bdd\u5c31\u6267\u884c\u7531THEN \u5173\u952e\u5b57\u5f00\u59cb\u7684\u90a3\u4e00\u5757\u4ee3\u7801\u3002\u5047\u5982\u4f60\u7684RNumber \u7b49\u4e8e495\uff0c\u90a3\u4e48\u8981\u5faa\u73af\u4e00\u904d\u6570\u636e\u5e93\u82b1\u7684\u65f6\u95f4\u53ef\u5c31\u957f\u4e86\u3002\u867d\u7136500\u8fd9\u4e2a\u6570\u5b57\u770b\u8d77\u6765\u5927\u4e86\u4e9b\uff0c\u4f46\u76f8\u6bd4\u66f4\u4e3a\u7a33\u56fa\u7684\u4f01\u4e1a\u89e3\u51b3\u65b9\u6848\u8fd9\u8fd8\u662f\u4e2a\u5c0f\u578b\u6570\u636e\u5e93\u4e86\uff0c\u540e\u8005\u901a\u5e38\u5728\u4e00\u4e2a\u6570\u636e\u5e93\u5185\u5c31\u5305\u542b\u4e86\u6210\u5343\u4e0a\u4e07\u6761\u8bb0\u5f55\u3002\u8fd9\u65f6\u5019\u4e0d\u5c31\u6b7b\u5b9a\u4e86\uff1f
\n\u91c7\u7528SQL\uff0c\u4f60\u5c31\u53ef\u4ee5\u5f88\u5feb\u5730\u627e\u51fa\u51c6\u786e\u7684\u8bb0\u5f55\u5e76\u4e14\u6253\u5f00\u4e00\u4e2a\u53ea\u5305\u542b\u8be5\u8bb0\u5f55\u7684recordset\uff0c\u5982\u4e0b\u6240\u793a\uff1a
\nRandomize
\nRNumber = Int(Rnd*499) + 1<\/p>\n
SQL = "Select * FROM Customers Where ID = " & RNumber<\/p>\n
set objRec = ObjConn.Execute(SQL)
\nResponse.WriteRNumber & " = " & objRec("ID") & " " & objRec("c_email")<\/p>\n
\u4e0d\u5fc5\u5199\u51faRNumber \u548cID\uff0c\u4f60\u53ea\u9700\u8981\u68c0\u67e5\u5339\u914d\u60c5\u51b5\u5373\u53ef\u3002\u53ea\u8981\u4f60\u5bf9\u4ee5\u4e0a\u4ee3\u7801\u7684\u5de5\u4f5c\u6ee1\u610f\uff0c\u4f60\u81ea\u53ef\u6309\u9700\u64cd\u4f5c\u201c\u968f\u673a\u201d\u8bb0\u5f55\u3002Recordset\u6ca1\u6709\u5305\u542b\u5176\u4ed6\u5185\u5bb9\uff0c\u56e0\u6b64\u4f60\u5f88\u5feb\u5c31\u80fd\u627e\u5230\u4f60\u9700\u8981\u7684\u8bb0\u5f55\u8fd9\u6837\u5c31\u5927\u5927\u964d\u4f4e\u4e86\u5904\u7406\u65f6\u95f4\u3002
\n\u518d\u8c08\u968f\u673a\u6570
\n\u73b0\u5728\u4f60\u4e0b\u5b9a\u51b3\u5fc3\u8981\u69a8\u5e72Random \u51fd\u6570\u7684\u6700\u540e\u4e00\u6ef4\u6cb9\uff0c\u90a3\u4e48\u4f60\u53ef\u80fd\u4f1a\u4e00\u6b21\u53d6\u51fa\u591a\u6761\u968f\u673a\u8bb0\u5f55\u6216\u8005\u60f3\u91c7\u7528\u4e00\u5b9a\u968f\u673a\u8303\u56f4\u5185\u7684\u8bb0\u5f55\u3002\u628a\u4e0a\u9762\u7684\u6807\u51c6Random \u793a\u4f8b\u6269\u5c55\u4e00\u4e0b\u5c31\u53ef\u4ee5\u7528SQL\u5e94\u5bf9\u4e0a\u9762\u4e24\u79cd\u60c5\u51b5\u4e86\u3002
\n\u4e3a\u4e86\u53d6\u51fa\u51e0\u6761\u968f\u673a\u9009\u62e9\u7684\u8bb0\u5f55\u5e76\u5b58\u653e\u5728\u540c\u4e00recordset\u5185\uff0c\u4f60\u53ef\u4ee5\u5b58\u50a8\u4e09\u4e2a\u968f\u673a\u6570\uff0c\u7136\u540e\u67e5\u8be2\u6570\u636e\u5e93\u83b7\u5f97\u5339\u914d\u8fd9\u4e9b\u6570\u5b57\u7684\u8bb0\u5f55\uff1a
\nSQL = "Select * FROM Customers Where ID = " & RNumber & " or ID = " & RNumber2 & " or ID = " & RNumber3<\/p>\n
\u5047\u5982\u4f60\u60f3\u9009\u51fa10\u6761\u8bb0\u5f55\uff08\u4e5f\u8bb8\u662f\u6bcf\u6b21\u9875\u9762\u88c5\u8f7d\u65f6\u768410\u6761\u94fe\u63a5\u7684\u5217\u8868\uff09\uff0c\u4f60\u53ef\u4ee5\u7528BETWEEN \u6216\u8005\u6570\u5b66\u7b49\u5f0f\u9009\u51fa\u7b2c\u4e00\u6761\u8bb0\u5f55\u548c\u9002\u5f53\u6570\u91cf\u7684\u9012\u589e\u8bb0\u5f55\u3002\u8fd9\u4e00\u64cd\u4f5c\u53ef\u4ee5\u901a\u8fc7\u597d\u51e0\u79cd\u65b9\u5f0f\u6765\u5b8c\u6210\uff0c\u4f46\u662f Select \u8bed\u53e5\u53ea\u663e\u793a\u4e00\u79cd\u53ef\u80fd\uff08\u8fd9\u91cc\u7684ID \u662f\u81ea\u52a8\u751f\u6210\u7684\u53f7\u7801\uff09\uff1a
\nSQL = "Select * FROM Customers Where ID BETWEEN " & RNumber & " AND " & RNumber & "+ 9"<\/p>\n
\u6ce8\u610f\uff1a\u4ee5\u4e0a\u4ee3\u7801\u7684\u6267\u884c\u76ee\u7684\u4e0d\u662f\u68c0\u67e5\u6570\u636e\u5e93\u5185\u662f\u5426\u67099\u6761\u5e76\u53d1\u8bb0\u5f55\u3002<\/p>\n
\u968f\u673a\u8bfb\u53d6\u82e5\u5e72\u6761\u8bb0\u5f55\uff0c\u6d4b\u8bd5\u8fc7
\nAccess\u8bed\u6cd5\uff1aSelect top 10 * From \u8868\u540d orDER BY Rnd(id)
\nSql server\u8bed\u6cd5\uff1aselect top n * from \u8868\u540d order by newid()
\nMySql\u8bed\u6cd5\uff1aSelect * From \u8868\u540d order By rand() Limit n
\nAccess\u5de6\u8fde\u63a5\u8bed\u6cd5(\u6700\u8fd1\u5f00\u53d1\u8981\u7528\u5de6\u8fde\u63a5,Access\u5e2e\u52a9\u4ec0\u4e48\u90fd\u6ca1\u6709,\u7f51\u4e0a\u6ca1\u6709Access\u7684SQL\u8bf4\u660e,\u53ea\u6709\u81ea\u5df1\u6d4b\u8bd5, \u73b0\u5728\u8bb0\u4e0b\u4ee5\u5907\u540e\u67e5)
\n\u8bed\u6cd5\uff1aSelect table1.fd1,table1,fd2,table2.fd2 From table1 left join table2 on table1.fd1,table2.fd1 where …
\n\u4f7f\u7528SQL\u8bed\u53e5 \u7528…\u4ee3\u66ff\u8fc7\u957f\u7684\u5b57\u7b26\u4e32\u663e\u793a
\n\u8bed\u6cd5\uff1a
\nSQL\u6570\u636e\u5e93\uff1aselect case when len(field)>10 then left(field,10)+'…' else field end as news_name,news_id from tablename
\nAccess\u6570\u636e\u5e93\uff1aSelect iif(len(field)>2,left(field,2)+'…',field) FROM tablename;<\/p>\n
Conn.Execute\u8bf4\u660e
\nExecute\u65b9\u6cd5
\n\u8be5\u65b9\u6cd5\u7528\u4e8e\u6267\u884cSQL\u8bed\u53e5\u3002\u6839\u636eSQL\u8bed\u53e5\u6267\u884c\u540e\u662f\u5426\u8fd4\u56de\u8bb0\u5f55\u96c6\uff0c\u8be5\u65b9\u6cd5\u7684\u4f7f\u7528\u683c\u5f0f\u5206\u4e3a\u4ee5\u4e0b\u4e24\u79cd\uff1a
\n1\uff0e\u6267\u884cSQL\u67e5\u8be2\u8bed\u53e5\u65f6\uff0c\u5c06\u8fd4\u56de\u67e5\u8be2\u5f97\u5230\u7684\u8bb0\u5f55\u96c6\u3002\u7528\u6cd5\u4e3a\uff1a
\nSet \u5bf9\u8c61\u53d8\u91cf\u540d=\u8fde\u63a5\u5bf9\u8c61.Execute("SQL \u67e5\u8be2\u8bed\u8a00")
\nExecute\u65b9\u6cd5\u8c03\u7528\u540e\uff0c\u4f1a\u81ea\u52a8\u521b\u5efa\u8bb0\u5f55\u96c6\u5bf9\u8c61\uff0c\u5e76\u5c06\u67e5\u8be2\u7ed3\u679c\u5b58\u50a8\u5728\u8be5\u8bb0\u5f55\u5bf9\u8c61\u4e2d\uff0c\u901a\u8fc7Set\u65b9\u6cd5\uff0c\u5c06\u8bb0\u5f55\u96c6\u8d4b\u7ed9\u6307\u5b9a\u7684\u5bf9\u8c61\u4fdd\u5b58\uff0c\u4ee5\u540e\u5bf9\u8c61\u53d8\u91cf\u5c31\u4ee3\u8868\u4e86\u8be5\u8bb0\u5f55\u96c6\u5bf9\u8c61\u3002<\/p>\n
2\uff0e\u6267\u884cSQL\u7684\u64cd\u4f5c\u6027\u8bed\u8a00\u65f6\uff0c\u6ca1\u6709\u8bb0\u5f55\u96c6\u7684\u8fd4\u56de\u3002\u6b64\u65f6\u7528\u6cd5\u4e3a\uff1a
\n\u8fde\u63a5\u5bf9\u8c61.Execute "SQL \u64cd\u4f5c\u6027\u8bed\u53e5" [, RecordAffected][, Option]
\n\u00b7RecordAffected \u4e3a\u53ef\u9009\u9879\uff0c\u6b64\u51fa\u53ef\u653e\u7f6e\u4e00\u4e2a\u53d8\u91cf\uff0cSQL\u8bed\u53e5\u6267\u884c\u540e\uff0c\u6240\u751f\u6548\u7684\u8bb0\u5f55\u6570\u4f1a\u81ea\u52a8\u4fdd\u5b58\u5230\u8be5\u53d8\u91cf\u4e2d\u3002\u901a\u8fc7\u8bbf\u95ee\u8be5\u53d8\u91cf\uff0c\u5c31\u53ef\u77e5\u9053SQL\u8bed\u53e5\u961f\u591a\u5c11\u6761\u8bb0\u5f55\u8fdb\u884c\u4e86\u64cd\u4f5c\u3002
\n\u00b7Option \u53ef\u9009\u9879\uff0c\u8be5\u53c2\u6570\u7684\u53d6\u503c\u901a\u5e38\u4e3aadCMDText\uff0c\u5b83\u7528\u4e8e\u544a\u8bc9ADO\uff0c\u5e94\u8be5\u5c06Execute\u65b9\u6cd5\u4e4b\u540e\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u89e3\u91ca\u4e3a\u547d\u4ee4\u6587\u672c\u3002\u901a\u8fc7\u6307\u5b9a\u8be5\u53c2\u6570\uff0c\u53ef\u4f7f\u6267\u884c\u66f4\u9ad8\u6548\u3002<\/p>\n
\u00b7BeginTrans\u3001RollbackTrans\u3001CommitTrans\u65b9\u6cd5
\n\u8fd9\u4e09\u4e2a\u65b9\u6cd5\u662f\u8fde\u63a5\u5bf9\u8c61\u63d0\u4f9b\u7684\u7528\u4e8e\u4e8b\u52a1\u5904\u7406\u7684\u65b9\u6cd5\u3002BeginTrans\u7528\u4e8e\u5f00\u59cb\u4e00\u4e2a\u4e8b\u7269\uff1bRollbackTrans\u7528\u4e8e\u56de\u6eda\u4e8b\u52a1\uff1bCommitTrans\u7528\u4e8e\u63d0\u4ea4\u6240\u6709\u7684\u4e8b\u52a1\u5904\u7406\u7ed3\u679c\uff0c\u5373\u786e\u8ba4\u4e8b\u52a1\u7684\u5904\u7406\u3002
\n\u4e8b\u52a1\u5904\u7406\u53ef\u4ee5\u5c06\u4e00\u7ec4\u64cd\u4f5c\u89c6\u4e3a\u4e00\u4e2a\u6574\u4f53\uff0c\u53ea\u6709\u5168\u90e8\u8bed\u53e5\u90fd\u6210\u529f\u6267\u884c\u540e\uff0c\u4e8b\u52a1\u5904\u7406\u624d\u7b97\u6210\u529f\uff1b\u82e5\u5176\u4e2d\u6709\u4e00\u4e2a\u8bed\u53e5\u6267\u884c\u5931\u8d25\uff0c\u5219\u6574\u4e2a\u5904\u7406\u5c31\u7b97\u5931\u8d25\uff0c\u5e76\u6062\u590d\u5230\u5904\u91cc\u524d\u7684\u72b6\u6001\u3002
\nBeginTrans\u548cCommitTrans\u7528\u4e8e\u6807\u8bb0\u4e8b\u52a1\u7684\u5f00\u59cb\u548c\u7ed3\u675f\uff0c\u5728\u8fd9\u4e24\u4e2a\u4e4b\u95f4\u7684\u8bed\u53e5\uff0c\u5c31\u662f\u4f5c\u4e3a\u4e8b\u52a1\u5904\u7406\u7684\u8bed\u53e5\u3002\u5224\u65ad\u4e8b\u52a1\u5904\u7406\u662f\u5426\u6210\u529f\uff0c\u53ef\u901a\u8fc7\u8fde\u63a5\u5bf9\u8c61\u7684Error\u96c6\u5408\u6765\u5b9e\u73b0\uff0c\u82e5Error\u96c6\u5408\u7684\u6210\u5458\u4e2a\u6570\u4e0d\u4e3a0\uff0c\u5219\u8bf4\u660e\u6709\u9519\u8bef\u53d1\u751f\uff0c\u4e8b\u52a1\u5904\u7406\u5931\u8d25\u3002Error\u96c6\u5408\u4e2d\u7684\u6bcf\u4e00\u4e2aError\u5bf9\u8c61\uff0c\u4ee3\u8868\u4e00\u4e2a\u9519\u8bef\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u7ecf\u5178SQL\u8bed\u53e5\u96c6\u9526 \u4e0b\u5217\u8bed\u53e5\u90e8\u5206\u662fMsSql\u8bed\u53e5\uff0c\u4e0d\u53ef\u4ee5\u5728access\u4e2d\u4f7f\u7528\u3002 SQL\u5206\u7c7b\uff1a DDL\u2014\u6570\u636e\u5b9a\u4e49\u8bed\u8a00(Create\uff0cAlter\uff0cDrop\uff0cDECLARE) … <\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[28],"tags":[],"class_list":["post-1359","post","type-post","status-publish","format-standard","hentry","category-computer"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=\/wp\/v2\/posts\/1359","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1359"}],"version-history":[{"count":0,"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=\/wp\/v2\/posts\/1359\/revisions"}],"wp:attachment":[{"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/opgogo.com\/blog2\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}